Danfoss GX Series, Installation Manual

Page: 13 / 28


It is recommended to cover the cables with a layer of sand or concrete at least 1" (2.5 cm)
before the asphalt is applied to protect them from the heat of the asphalt. Use of sand or
concrete will ensure an effective and efficient heat transfer through the asphalt.

If using sand or concrete, allow the asphalt to cool to a temperature of 265°F (130°C)
maximum before pouring. If using without sand or concrete, allow asphalt to cool to
220°F/ (105°C) before pouring directly on mats/cables. Ground sensors/tubes should not
be exposed to temperatures above 80°C (176°F.)

The cables are normally covered by 2 inches of asphalt.

A perimeter of maximum 12” (30 cm) of asphalt should exist, unheated around the
embedded cables. This allows for adjustment of the paving surface edge without
damaging the heating cable.

The operating weight of the asphalt roller should not exceed 1000lbs.
Asphalt Installation (continued)
When installing heating cables the following should be observed:
 Begin installation as close as possible to electrical supply source. The heating cable
must not be cut or shortened or exposed to strain in the areas of the cold tail/heating
cable coupling.

 When placing the sensors please see page 7.
 Special care should be taken not to damage the heating cables with tools and
machinery during the installation and application of the surface material.
 Ensure that all sharp stones and debris are removed from the area where the heating
cables are going to be installed.
 Should the cable become damaged during the installation process it is helpful to know
the location of the cold tail/heating cable connection. Take a picture or sketch to show
where the connection/end cap is in case a fault needs to be found.
Insulation can be installed to improve efficiency of the heating system.
Stonework Installation
12
ASPHALT
ASPHALT
GX HEATING MAT/CABLE
SAND/CONCRETE
EMBEDDING
CRUSHED STONE
AND/OR INSULATION
CRUSHED STONE
AND/OR INSULATION
GROUND
GROUND
GX HEATING MAT/CABLE IN ASPHALT
(ALLOW ASPHALT TO COOL TO 220 F
BEFORE POURING ON MATS/CABLES)
MAT EMBEDDED IN
SAND/CONCRETE
MAT EMBEDDED
DIRECTLY IN ASPHALT
Copyright 20
17
Danfoss TEL:
1-888-326-3677
. FAX:
416-352-5981
VIAPF222 05/17
Copyright 20
17
Danfoss
TEL:
1-888-326-3677
. FAX:
416-352-5981
VIAPF222 05/17